# Market Catalogues - Missingness Co-occurrence

> Market Catalogues - Missingness Co-occurrence is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.020337/call, status unknown (last checked 2026-10-16).

Counts paired missing values across owner, revision, and content pins in merchant/catalogue/SKU/revision-pinned public product records, detecting co-occurring missingness without treating absent values as matching.

## Facts

- Endpoint: POST https://www.mahastrategies.com/api/v1/intel/market-catalogues/missingness-cooccurrence?utm_source=zero.xyz
- Price: $0.020337/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/market-catalogues-missingness-co-occurrence-359b911f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W2zicn-sgHkpDDgVezlOI

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability market-catalogues-missingness-co-occurrence-359b911f -d '<json body>'
```

Example prompt: Check these 20 public market catalogue rows for co-occurring missingness across owner, revision, and content pins — I need to know which pin pairs are simultaneously absent across records, not just individually missing.

## When to prefer this

Choose this endpoint when you need to specifically identify and count co-occurring missing pin pairs (owner, revision, content) in market catalogue records, particularly where silent treatment of missing values as matching would corrupt downstream analysis. Prefer this over generic null-checking tools when working with merchant/catalogue/SKU-pinned product data structures and needing precise paired-absence statistics.

## Known failure modes

- Rows array empty or exceeds 32-item limit — validation error returned
- nonPersonalMetadata not set to true — request rejected
- dataClass not one of 'public' or 'synthetic' — enum validation failure
- Malformed row objects in array — parsing or schema error
- Payment not completed via x402 protocol — 402 Payment Required response

## How this service works

Count paired missing owner, revision and content pins without silently treating a missing value as a matching value for merchant/catalogue/SKU/revision-pinned public product Supplied-record analysis, not independent certification. Full contract at the free describe URL.

## Output

Returns counts of paired missing pin occurrences across owner, revision, and content fields in the supplied catalogue rows, identifying which combinations of pins are co-absent without treating missing values as matching values. This is a supplied-record analysis, not independent certification.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rows": {
   "type": "array",
   "maxItems": 32,
   "minItems": 1
  },
  "dataClass": {
   "enum": [
    "public",
    "synthetic"
   ],
   "type": "string"
  },
  "nonpersonalMetadata": {
   "type": "boolean",
   "const": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-catalogues-missingness-co-occurrence-359b911f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.mahastrategies.com](https://www.zero.xyz/host/www.mahastrategies.com/llms.txt)